bash function to check if internet is available

hasinternet.bash

has_internet()
{   #check for internet connection, returns 0 on success, 1 otherwise
    wget --tries=3 --timeout=5 http://www.google.com -O /tmp/index.google > /dev/null 2>&1

    if [ -s /tmp/index.google ]; then
        rm /tmp/index.google
        return 0
    else
        rm /tmp/index.google
        return 1
    fi
}